121211001012021 has 16 divisors (see below), whose sum is σ = 164279569065600. Its totient is φ = 79475133165120.

The previous prime is 121211001011987. The next prime is 121211001012119. The reversal of 121211001012021 is 120210100112121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-121211001012021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211001012421) 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, 29262721 + ... + 33147078.

It is an arithmetic number, because the mean of its divisors is an integer number (10267473066600).

Almost surely, 2^{121211001012021} is an apocalyptic number.

It is an amenable number.

121211001012021 is a deficient number, since it is larger than the sum of its proper divisors (43068568053579).

121211001012021 is a wasteful number, since it uses less digits than its factorization.

121211001012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62420476.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121211001012021 its reverse (120210100112121), we get a palindrome (241421101124142).

The spelling of 121211001012021 in words is "one hundred twenty-one trillion, two hundred eleven billion, one million, twelve thousand, twenty-one".