103121210020090 has 16 divisors (see below), whose sum is σ = 185627339754120. Its totient is φ = 41246448070720.

The previous prime is 103121210020067. The next prime is 103121210020091. The reversal of 103121210020090 is 90020012121301.

It can be written as a sum of positive squares in 4 ways, for example, as 66809486121849 + 36311723898241 = 8173707^2 + 6025921^2 .

It is not an unprimeable number, because it can be changed into a prime (103121210020091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254279425 + ... + 254684644.

Almost surely, 2^{103121210020090} is an apocalyptic number.

103121210020090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

103121210020090 is a deficient number, since it is larger than the sum of its proper divisors (82506129734030).

103121210020090 is a wasteful number, since it uses less digits than its factorization.

103121210020090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508984337.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 103121210020090 its reverse (90020012121301), we get a palindrome (193141222141391).

The spelling of 103121210020090 in words is "one hundred three trillion, one hundred twenty-one billion, two hundred ten million, twenty thousand, ninety".