1211202121022 has 64 divisors (see below), whose sum is σ = 1913171927040. Its totient is φ = 574391001600.

The previous prime is 1211202120901. The next prime is 1211202121039. The reversal of 1211202121022 is 2201212021121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 409603568 + ... + 409606524.

It is an arithmetic number, because the mean of its divisors is an integer number (29893311360).

Almost surely, 2^{1211202121022} is an apocalyptic number.

1211202121022 is a deficient number, since it is larger than the sum of its proper divisors (701969806018).

1211202121022 is a wasteful number, since it uses less digits than its factorization.

1211202121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3657.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211202121022 its reverse (2201212021121), we get a palindrome (3412414142143).

Subtracting 1211202121022 from its reverse (2201212021121), we obtain a palindrome (990009900099).

The spelling of 1211202121022 in words is "one trillion, two hundred eleven billion, two hundred two million, one hundred twenty-one thousand, twenty-two".