1202102001 has 24 divisors (see below), whose sum is σ = 1785944160. Its totient is φ = 778680000.

The previous prime is 1202101987. The next prime is 1202102021. The reversal of 1202102001 is 1002012021.

It is not a de Polignac number, because 1202102001 - 2²¹ = 1200004849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1202102021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86130 + ... + 99108.

It is an arithmetic number, because the mean of its divisors is an integer number (74414340).

Almost surely, 2^1202102001 is an apocalyptic number.

It is an amenable number.

1202102001 is a deficient number, since it is larger than the sum of its proper divisors (583842159).

1202102001 is a wasteful number, since it uses less digits than its factorization.

1202102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13277 (or 13274 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1202102001 is about 34671.3426477833. The cubic root of 1202102001 is about 1063.2786820726.

Adding to 1202102001 its reverse (1002012021), we get a palindrome (2204114022).

The spelling of 1202102001 in words is "one billion, two hundred two million, one hundred two thousand, one".