121211022021 has 8 divisors (see below), whose sum is σ = 161667923424. Its totient is φ = 80780734320.

The previous prime is 121211021983. The next prime is 121211022043. The reversal of 121211022021 is 120220112121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121211022021 - 2¹⁴ = 121211005637 is a prime.

It is a super-2 number, since 2×121211022021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211022221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6642795 + ... + 6661016.

It is an arithmetic number, because the mean of its divisors is an integer number (20208490428).

Almost surely, 2^121211022021 is an apocalyptic number.

It is an amenable number.

121211022021 is a deficient number, since it is larger than the sum of its proper divisors (40456901403).

121211022021 is a wasteful number, since it uses less digits than its factorization.

121211022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13306851.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121211022021 its reverse (120220112121), we get a palindrome (241431134142).

The spelling of 121211022021 in words is "one hundred twenty-one billion, two hundred eleven million, twenty-two thousand, twenty-one".