1211862652950 has 24 divisors (see below), whose sum is σ = 3005419379688. Its totient is φ = 323163374080.

The previous prime is 1211862652939. The next prime is 1211862652951. The reversal of 1211862652950 is 592562681121.

It is a super-2 number, since 2×1211862652950² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211862652950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211862652951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4039542027 + ... + 4039542326.

It is an arithmetic number, because the mean of its divisors is an integer number (125225807487).

Almost surely, 2^{1211862652950} is an apocalyptic number.

1211862652950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211862652950 is an abundant number, since it is smaller than the sum of its proper divisors (1793556726738).

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

1211862652950 is a wasteful number, since it uses less digits than its factorization.

1211862652950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8079084368 (or 8079084363 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 1211862652950 in words is "one trillion, two hundred eleven billion, eight hundred sixty-two million, six hundred fifty-two thousand, nine hundred fifty".