1210012212121 has 16 divisors (see below), whose sum is σ = 1254271233600. Its totient is φ = 1166787281088.

The previous prime is 1210012212113. The next prime is 1210012212161. The reversal of 1210012212121 is 1212122100121.

It is a cyclic number.

It is not a de Polignac number, because 1210012212121 - 2³ = 1210012212113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210012212095 and 1210012212104.

It is not an unprimeable number, because it can be changed into a prime (1210012212161) 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, 391966 + ... + 1604263.

It is an arithmetic number, because the mean of its divisors is an integer number (78391952100).

Almost surely, 2^{1210012212121} is an apocalyptic number.

It is an amenable number.

1210012212121 is a deficient number, since it is larger than the sum of its proper divisors (44259021479).

1210012212121 is a wasteful number, since it uses less digits than its factorization.

1210012212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996488.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1210012212121 its reverse (1212122100121), we get a palindrome (2422134312242).

The spelling of 1210012212121 in words is "one trillion, two hundred ten billion, twelve million, two hundred twelve thousand, one hundred twenty-one".