1021200101212 has 24 divisors (see below), whose sum is σ = 1898416427600. Its totient is φ = 479288503296.

The previous prime is 1021200101203. The next prime is 1021200101227. The reversal of 1021200101212 is 2121010021201.

It is a junction number, because it is equal to n+sod(n) for n = 1021200101192 and 1021200101201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61628613 + ... + 61645180.

Almost surely, 2^{1021200101212} is an apocalyptic number.

It is an amenable number.

1021200101212 is a deficient number, since it is larger than the sum of its proper divisors (877216326388).

1021200101212 is a wasteful number, since it uses less digits than its factorization.

1021200101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123273925 (or 123273923 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021200101212 its reverse (2121010021201), we get a palindrome (3142210122413).

The spelling of 1021200101212 in words is "one trillion, twenty-one billion, two hundred million, one hundred one thousand, two hundred twelve".