1212687561212 has 6 divisors (see below), whose sum is σ = 2122203232128. Its totient is φ = 606343780604.

The previous prime is 1212687561209. The next prime is 1212687561227. The reversal of 1212687561212 is 2121657862121.

It is a happy number.

It is a super-2 number, since 2×1212687561212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151585945148 + ... + 151585945155.

It is an arithmetic number, because the mean of its divisors is an integer number (353700538688).

Almost surely, 2^{1212687561212} is an apocalyptic number.

It is an amenable number.

1212687561212 is a deficient number, since it is larger than the sum of its proper divisors (909515670916).

1212687561212 is a wasteful number, since it uses less digits than its factorization.

1212687561212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303171890307 (or 303171890305 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The spelling of 1212687561212 in words is "one trillion, two hundred twelve billion, six hundred eighty-seven million, five hundred sixty-one thousand, two hundred twelve".