61721214001226 has 8 divisors (see below), whose sum is σ = 99703499540484. Its totient is φ = 28486714154400.

The previous prime is 61721214001217. The next prime is 61721214001229. The reversal of 61721214001226 is 62210041212716.

It is a Cunningham number, because it is equal to 7856285²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 61721214001225 + 1 = 7856285^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61721214001229) 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, 1186946423075 + ... + 1186946423126.

Almost surely, 2^{61721214001226} is an apocalyptic number.

61721214001226 is a deficient number, since it is larger than the sum of its proper divisors (37982285539258).

61721214001226 is a wasteful number, since it uses less digits than its factorization.

61721214001226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373892846216.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 61721214001226 in words is "sixty-one trillion, seven hundred twenty-one billion, two hundred fourteen million, one thousand, two hundred twenty-six".