121211012201000 has 32 divisors (see below), whose sum is σ = 283633768552680. Its totient is φ = 48484404880000.

The previous prime is 121211012200991. The next prime is 121211012201009. The reversal of 121211012201000 is 102210112121.

It is an interprime number because it is at equal distance from previous prime (121211012200991) and next prime (121211012201009).

It can be written as a sum of positive squares in 4 ways, for example, as 54144313991524 + 67066698209476 = 7358282^2 + 8189426^2 .

It is not an unprimeable number, because it can be changed into a prime (121211012201009) 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, 60605505101 + ... + 60605507100.

Almost surely, 2^{121211012201000} is an apocalyptic number.

121211012201000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211012201000 is an abundant number, since it is smaller than the sum of its proper divisors (162422756351680).

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

121211012201000 is a wasteful number, since it uses less digits than its factorization.

121211012201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121211012222 (or 121211012208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121211012201000 its reverse (102210112121), we get a palindrome (121313222313121).

The spelling of 121211012201000 in words is "one hundred twenty-one trillion, two hundred eleven billion, twelve million, two hundred one thousand".