121721612070070 has 8 divisors (see below), whose sum is σ = 219098901726144. Its totient is φ = 48688644828024.

The previous prime is 121721612070007. The next prime is 121721612070077. The reversal of 121721612070070 is 70070216127121.

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

It is a super-2 number, since 2×121721612070070² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121721612070077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6086080603494 + ... + 6086080603513.

It is an arithmetic number, because the mean of its divisors is an integer number (27387362715768).

Almost surely, 2^{121721612070070} is an apocalyptic number.

121721612070070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121721612070070 is a deficient number, since it is larger than the sum of its proper divisors (97377289656074).

121721612070070 is a wasteful number, since it uses less digits than its factorization.

121721612070070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12172161207014.

The product of its (nonzero) digits is 16464, while the sum is 37.

Adding to 121721612070070 its reverse (70070216127121), we get a palindrome (191791828197191).

The spelling of 121721612070070 in words is "one hundred twenty-one trillion, seven hundred twenty-one billion, six hundred twelve million, seventy thousand, seventy".