1220405520310 has 48 divisors (see below), whose sum is σ = 2393220788352. Its totient is φ = 447551049600.

The previous prime is 1220405520283. The next prime is 1220405520311. The reversal of 1220405520310 is 130255040221.

It is a super-2 number, since 2×1220405520310² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220405520311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5340711 + ... + 5564530.

It is an arithmetic number, because the mean of its divisors is an integer number (49858766424).

Almost surely, 2^{1220405520310} is an apocalyptic number.

1220405520310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220405520310 is a deficient number, since it is larger than the sum of its proper divisors (1172815268042).

1220405520310 is a wasteful number, since it uses less digits than its factorization.

1220405520310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10905317 (or 10905298 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 1220405520310 in words is "one trillion, two hundred twenty billion, four hundred five million, five hundred twenty thousand, three hundred ten".