1221212002095 has 24 divisors (see below), whose sum is σ = 2121589298400. Its totient is φ = 649829428416.

The previous prime is 1221212002079. The next prime is 1221212002099. The reversal of 1221212002095 is 5902002121221.

It is a happy number.

It is not a de Polignac number, because 1221212002095 - 2⁴ = 1221212002079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221212002099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30889180 + ... + 30928689.

It is an arithmetic number, because the mean of its divisors is an integer number (88399554100).

Almost surely, 2^{1221212002095} is an apocalyptic number.

1221212002095 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1221212002095 is a deficient number, since it is larger than the sum of its proper divisors (900377296305).

1221212002095 is a wasteful number, since it uses less digits than its factorization.

1221212002095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61818319 (or 61818316 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 1221212002095 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, two thousand, ninety-five".