121211020020010 has 16 divisors (see below), whose sum is σ = 218215527269256. Its totient is φ = 48476476622848.

The previous prime is 121211020019963. The next prime is 121211020020037. The reversal of 121211020020010 is 10020020112121.

It can be written as a sum of positive squares in 4 ways, for example, as 79547080452889 + 41663939567121 = 8918917^2 + 6454761^2 .

It is a super-2 number, since 2×121211020020010² (a number of 29 digits) contains 22 as substring.

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, 991358959 + ... + 991481218.

Almost surely, 2^{121211020020010} is an apocalyptic number.

121211020020010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211020020010 is a deficient number, since it is larger than the sum of its proper divisors (97004507249246).

121211020020010 is a wasteful number, since it uses less digits than its factorization.

121211020020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982846297.

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

Adding to 121211020020010 its reverse (10020020112121), we get a palindrome (131231040132131).

The spelling of 121211020020010 in words is "one hundred twenty-one trillion, two hundred eleven billion, twenty million, twenty thousand, ten".