121026619 has 6 divisors (see below), whose sum is σ = 140786124. Its totient is φ = 103737060.

The previous prime is 121026611. The next prime is 121026643. The reversal of 121026619 is 916620121.

It is not a de Polignac number, because 121026619 - 2³ = 121026611 is a prime.

It is a super-2 number, since 2×121026619² = 29294885013142322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121026611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1234917 + ... + 1235014.

It is an arithmetic number, because the mean of its divisors is an integer number (23464354).

Almost surely, 2^121026619 is an apocalyptic number.

121026619 is a deficient number, since it is larger than the sum of its proper divisors (19759505).

121026619 is an equidigital number, since it uses as much as digits as its factorization.

121026619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469945 (or 2469938 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 121026619 is about 11001.2098880078. The cubic root of 121026619 is about 494.6450116109.

It can be divided in two parts, 12102 and 6619, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 121026619 in words is "one hundred twenty-one million, twenty-six thousand, six hundred nineteen".