121210221111000 has 128 divisors (see below), whose sum is σ = 432201017064960. Its totient is φ = 27705193392000.

The previous prime is 121210221110981. The next prime is 121210221111107. The reversal of 121210221111000 is 111122012121.

It is a happy number.

121210221111000 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×121210221111000⁴ (a number of 57 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 2885936646 + ... + 2885978645.

It is an arithmetic number, because the mean of its divisors is an integer number (3376570445820).

Almost surely, 2^{121210221111000} is an apocalyptic number.

121210221111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210221111000 is an abundant number, since it is smaller than the sum of its proper divisors (310990795953960).

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

121210221111000 is a wasteful number, since it uses less digits than its factorization.

121210221111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771915322 (or 5771915308 counting only the distinct ones).

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

Adding to 121210221111000 its reverse (111122012121), we get a palindrome (121321343123121).

The spelling of 121210221111000 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred twenty-one million, one hundred eleven thousand".