1211722838950 has 24 divisors (see below), whose sum is σ = 2427174057168. Its totient is φ = 447405355680.

The previous prime is 1211722838941. The next prime is 1211722838971. The reversal of 1211722838950 is 598382271121.

It is a junction number, because it is equal to n+sod(n) for n = 1211722838894 and 1211722838903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 932093842 + ... + 932095141.

It is an arithmetic number, because the mean of its divisors is an integer number (101132252382).

Almost surely, 2^{1211722838950} is an apocalyptic number.

1211722838950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211722838950 is an abundant number, since it is smaller than the sum of its proper divisors (1215451218218).

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

1211722838950 is a wasteful number, since it uses less digits than its factorization.

1211722838950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864189008 (or 1864189003 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 1211722838950 in words is "one trillion, two hundred eleven billion, seven hundred twenty-two million, eight hundred thirty-eight thousand, nine hundred fifty".