121111101121210 has 8 divisors (see below), whose sum is σ = 217999982018196. Its totient is φ = 48444440448480.

The previous prime is 121111101121189. The next prime is 121111101121243. The reversal of 121111101121210 is 12121101111121.

It can be written as a sum of positive squares in 2 ways, for example, as 107093542657201 + 14017558464009 = 10348601^2 + 3744003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121111101121210² (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 3 ways as a sum of consecutive naturals, for example, 6055555056051 + ... + 6055555056070.

Almost surely, 2^{121111101121210} is an apocalyptic number.

121111101121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111101121210 is a deficient number, since it is larger than the sum of its proper divisors (96888880896986).

121111101121210 is a wasteful number, since it uses less digits than its factorization.

121111101121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12111110112128.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 121111101121210 its reverse (12121101111121), we get a palindrome (133232202232331).

The spelling of 121111101121210 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred one million, one hundred twenty-one thousand, two hundred ten".