1021121201802 has 32 divisors (see below), whose sum is σ = 2199378847680. Its totient is φ = 314185299840.

The previous prime is 1021121201801. The next prime is 1021121201819. The reversal of 1021121201802 is 2081021211201.

It is not an unprimeable number, because it can be changed into a prime (1021121201801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6184177 + ... + 6347147.

It is an arithmetic number, because the mean of its divisors is an integer number (68730588990).

Almost surely, 2^{1021121201802} is an apocalyptic number.

1021121201802 is an abundant number, since it is smaller than the sum of its proper divisors (1178257645878).

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

1021121201802 is a wasteful number, since it uses less digits than its factorization.

1021121201802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243318.

The product of its (nonzero) digits is 128, while the sum is 21.

The spelling of 1021121201802 in words is "one trillion, twenty-one billion, one hundred twenty-one million, two hundred one thousand, eight hundred two".