121021001220010 has 16 divisors (see below), whose sum is σ = 217838478412296. Its totient is φ = 48408250217728.

The previous prime is 121021001219983. The next prime is 121021001220037. The reversal of 121021001220010 is 10022100120121.

It is an interprime number because it is at equal distance from previous prime (121021001219983) and next prime (121021001220037).

It can be written as a sum of positive squares in 4 ways, for example, as 114955858732009 + 6065142488001 = 10721747^2 + 2462751^2 .

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, 15371779 + ... + 21870838.

Almost surely, 2^{121021001220010} is an apocalyptic number.

121021001220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021001220010 is a deficient number, since it is larger than the sum of its proper divisors (96817477192286).

121021001220010 is a wasteful number, since it uses less digits than its factorization.

121021001220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37567577.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121021001220010 its reverse (10022100120121), we get a palindrome (131043101340131).

The spelling of 121021001220010 in words is "one hundred twenty-one trillion, twenty-one billion, one million, two hundred twenty thousand, ten".