20015121200290 has 16 divisors (see below), whose sum is σ = 36087363777600. Its totient is φ = 7992682787440.

The previous prime is 20015121200233. The next prime is 20015121200303. The reversal of 20015121200290 is 9200212151002.

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, 1670705296 + ... + 1670717275.

It is an arithmetic number, because the mean of its divisors is an integer number (2255460236100).

Almost surely, 2^{20015121200290} is an apocalyptic number.

20015121200290 is a deficient number, since it is larger than the sum of its proper divisors (16072242577310).

20015121200290 is a wasteful number, since it uses less digits than its factorization.

20015121200290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341423177.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 20015121200290 its reverse (9200212151002), we get a palindrome (29215333351292).

The spelling of 20015121200290 in words is "twenty trillion, fifteen billion, one hundred twenty-one million, two hundred thousand, two hundred ninety".