10211220120402 has 24 divisors (see below), whose sum is σ = 25284926012736. Its totient is φ = 2917491462936.

The previous prime is 10211220120391. The next prime is 10211220120403. The reversal of 10211220120402 is 20402102211201.

10211220120402 is a `hidden beast` number, since 1 + 0 + 21 + 1 + 220 + 1 + 20 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10211220120403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40520714638 + ... + 40520714889.

It is an arithmetic number, because the mean of its divisors is an integer number (1053538583864).

Almost surely, 2^{10211220120402} is an apocalyptic number.

10211220120402 is an abundant number, since it is smaller than the sum of its proper divisors (15073705892334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10211220120402 is a wasteful number, since it uses less digits than its factorization.

10211220120402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81041429542 (or 81041429539 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 10211220120402 its reverse (20402102211201), we get a palindrome (30613322331603).

The spelling of 10211220120402 in words is "ten trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty thousand, four hundred two".