1220121220190 has 16 divisors (see below), whose sum is σ = 2196253926000. Its totient is φ = 488040548160.

The previous prime is 1220121220189. The next prime is 1220121220229. The reversal of 1220121220190 is 910221210221.

It is a super-2 number, since 2×1220121220190² (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 in 7 ways as a sum of consecutive naturals, for example, 325751 + ... + 1595730.

It is an arithmetic number, because the mean of its divisors is an integer number (137265870375).

Almost surely, 2^{1220121220190} is an apocalyptic number.

1220121220190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220121220190 is a deficient number, since it is larger than the sum of its proper divisors (976132705810).

1220121220190 is a wasteful number, since it uses less digits than its factorization.

1220121220190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984987.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 1220121220190 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, one hundred ninety".