121211221121022 has 16 divisors (see below), whose sum is σ = 255181518149760. Its totient is φ = 38277227722392.

The previous prime is 121211221120949. The next prime is 121211221121059. The reversal of 121211221121022 is 220121122112121.

It is a self number, because there is not a number n which added to its sum of digits gives 121211221121022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531628162698 + ... + 531628162925.

It is an arithmetic number, because the mean of its divisors is an integer number (15948844884360).

Almost surely, 2^{121211221121022} is an apocalyptic number.

121211221121022 is an abundant number, since it is smaller than the sum of its proper divisors (133970297028738).

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

121211221121022 is a wasteful number, since it uses less digits than its factorization.

121211221121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063256325647.

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

Adding to 121211221121022 its reverse (220121122112121), we get a palindrome (341332343233143).

The spelling of 121211221121022 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-two".